package com.szq.controller;

import cn.hutool.json.JSONUtil;
import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.szq.common.R;
import com.szq.dto.DishDto;
import com.szq.entity.Category;
import com.szq.entity.Dish;
import com.szq.entity.DishFlavor;
import com.szq.service.CategoryService;
import com.szq.service.DishFlavorService;
import com.szq.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.bind.annotation.*;
import org.w3c.dom.ls.LSException;

import javax.annotation.Resource;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {


    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;


    @Autowired
    private CategoryService categoryService;

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 菜品分页查询
     * @param page
     * @param pageSize
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        Page<Dish> pageInfo=new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage=new Page<>();

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        queryWrapper.like(StringUtils.isNotEmpty(name),Dish::getName,name);

        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list= records.stream().map((item)->{
            DishDto dishDto=new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.savesWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set<String> keys = stringRedisTemplate.keys("dish_*");
        //stringRedisTemplate.delete(keys);

        //清理某个分类下面的菜品数据
        String key="dish_"+dishDto.getCategoryId()+"_1";
        stringRedisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set<String> keys = stringRedisTemplate.keys("dish_*");
        //stringRedisTemplate.delete(keys);

        //清理某个分类下面的菜品数据
        String key="dish_"+dishDto.getCategoryId()+"_1";
        stringRedisTemplate.delete(key);

        return R.success("修改菜品成功");
    }


    /**
     * 修改菜品状态
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable Integer status,@RequestParam List<Long> ids){
        log.info("状态{}, id{}",status,ids);
        LambdaUpdateWrapper<Dish> queryWrapper = new LambdaUpdateWrapper<>();
        queryWrapper.in(Dish::getId,ids);
        queryWrapper.set(Dish::getStatus,status);
        dishService.update(queryWrapper);

        return R.success("菜品状态修改成功");
    }


    /**
     * 根据id删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam List<Long> ids){
        log.info("根据ids删除菜品");

        dishService.deleteDishWithFlavor(ids);

        return R.success("菜品删除成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */
    /*@GetMapping("/list")
    public R<List<Dish>> list(Dish dish){

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        return R.success(list);
    }*/

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList=null;

        String key="dish_"+dish.getCategoryId()+"_"+dish.getStatus();

        //从redis中获取缓存数据
        String strjson = stringRedisTemplate.opsForValue().get(key);
//        dishDtoList = JSONUtil.toList(JSONUtil.parseArray(strjson),DishDto.class);

        if (strjson!=null){
            //如果存在，则直接返回，无需查询数据库
            dishDtoList= JSONUtil.toList(strjson, DishDto.class);
            return R.success(dishDtoList);
        }


        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList= list.stream().map((item)->{
            DishDto dishDto=new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper=new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //Sql
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        stringRedisTemplate.opsForValue().set(key, JSONUtil.toJsonStr(dishDtoList),60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }


}
